<template>
  <div class="login_container">
    <div class="login_box">
      <!-- 登录logo -->
      <div class="avatar_box">
        <img src="../../assets/image/logo.png" alt="" />
      </div>
      <!-- Form 表单 -->
      <el-form label-width="0px" class="login_form" :model="loginForm" :rules="loginRules" ref="loginFormRef">
        <!-- 用户输入框 -->
        <el-form-item prop="username">
          <el-input autofocus prefix-icon="iconfont icon-user" v-model="loginForm.username"></el-input>
        </el-form-item>
        <!-- 密码输入框 -->
        <el-form-item prop="password">
          <el-input type="password" prefix-icon="iconfont icon-3702mima" v-model="loginForm.password" @keyup.enter.native="login"></el-input>
        </el-form-item>
        <!-- 按钮区域 -->
        <el-form-item class="btns">
          <el-button type="primary" @click="login">登录</el-button>
          <el-button type="info" @click="resetLoginForm">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 绑定数据
      loginForm: {
        username: '',
        password: ''
      },
      // 定义验证输入规则
      loginRules: {
        username: [
          {required: true, message: '请输入登录用户名', trigger: "blur"},
          {min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: "blur"}
        ],
        password: [
          {required: true, message: '请输入密码登录', trigger: "blur"},
          {min: 6, max: 15, message: '长度在 6 到 15 个字符', trigger: "blur"}
        ]
      }
    }
  },
  methods: {
    // 点击重置按钮清空表单
    resetLoginForm() {
      this.$refs.loginFormRef.resetFields()
    },
    // 点击登录发送请求登录
    login() {
      this.$refs.loginFormRef.validate(async vali => {
        if(!vali)  return
        let {data: res} = await this.$http.post('login',this.loginForm)
        if(res.meta.status !== 200) return this.$message.error('登录失败')
        this.$message.success('登录成功')
        // 保存请求回来的token 到 sessionStorage
        window.sessionStorage.setItem('token', res.data.token)

        // 路由跳转到新页面
        this.$router.push('/home')

      })
    }
  }
};
</script>

<style lang="less" scoped>
.login_container {
  background-color: #2b4b6b;
  height: 100%;
}

.login_box {
  width: 450px;
  height: 300px;
  background-color: #fff;
  border-radius: 3px;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);

  .avatar_box {
    width: 130px;
    height: 130px;
    border: 1px solid #eee;
    border-radius: 50%;
    padding: 10px;
    position: absolute;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: #fff;
    box-shadow: 0 0 10px #eee;
    img {
      width: 100%;
      height: 100%;
      border-radius: 50%;
      background-color: #eee;
    }
  }
  .login_form {
    position: absolute;
    bottom: 0px;
    padding: 20px;
    width: 100%;
  }
  .btns {
    display: flex;
    justify-content: flex-end;
  }
}
</style>